

import formula.calculator.R;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;


public class Area extends Activity{
        
        private double answer = 0;

        @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.two_dimensional_shapes);
    }
        
        public void onClick(View v) {
                Intent i = null;
                switch(v.getId()) {
                
                }
                if(i != null) {
                        startActivity(i);
                }
        }
        
/****           Area formulas                   ****/
        
        private void squareArea(double x) {
                double result = x * x;
                answer = result;
        }
        
        private void rectangleArea(double length, double width) {
                double result = length * width;
                answer = result;
        }
        
        private void parallelogramArea(double length, double height) {
                double result = length * height;
                answer = result;
        }
        
        private void trapezoidArea(double base1, double base2, double height) {
                double result = (height / 2) * (base1 + base2);
                answer = result;
        }
        
        private void circleArea(double radius) {
                double result = Math.PI * (radius * radius);
                answer = result;
        }
        
        private void triangleArea(double base, double height) {
                double result = base * height / 2;
                answer = result;
        }
        
        private void triangleSasArea(double side1, double side2, double angle) {
                double result = side1 * side2 * Math.sin(angle) / 2;
                answer = result;
        }
}
